It’s a game, or at least an assignment. Hooded beings convince us that they can rend time and drop us into any era, any generation and locale. Bethlehem at the time of Christ’s birth, which is likely apocryphal. We can rend time so that only a moment will pass in your actual lifetime. You are dropped into a life in that era and you will live a life. But only moments pass in your real life. But then, what is real?;
What would it take before the traveler breaks whatever bargain and changes that era. It’s that what we do anyway?